1. Press and hold down the On/Off button on the right side (iPhone 6s or iPhone 6) or top (all other iPhones, iPods, and iPads) of your device.
2. While continuing to hold the On/Off button, press and hold the Home button on the front of your iPhone, iPod touch, or iPad.
3. Hold both buttons as the screen turns off, and keep holding them until the screen turns back on and displays the Apple logo.